A traveling mechanism of a tower crane

Abstract

A tower crane travel mechanism includes: multiple sets of travel wheel assemblies, which are arranged at the bottom of a base, cooperate with tracks and travel on the tracks; multiple sets of drive assemblies, which drive the multiple sets of travel wheel assemblies to travel on the tracks; a load balancing detection assembly, which is installed on each travel wheel and detects the working status and wear degree of each travel wheel; a counterweight adjustment assembly, which includes a counterweight and a support adjustment assembly, and the support adjustment assembly adjusts the position and / or distribution of the counterweight according to the working status and wear degree of the travel wheel detected by the load balancing detection assembly. The present invention sets a load balancing detection assembly for each travel wheel, which can not only correct large eccentric loads in time by monitoring the working status of the travel wheel, but also improve the pressure load distribution distributed on each travel wheel through the counterweight adjustment assembly according to the wear difference of different travel wheels after a period of use, thereby reducing the wear difference of the travel wheels, improving the balance stability of the tower crane, and reducing the maintenance frequency.

Description

Technical Field

[0001] The invention relates to the technical field of crane travel control, in particular to a tower crane travel mechanism. Background Art

[0002] The tower crane travel mechanism is driven by a plurality of reduction motors to drive the travel wheel assembly to travel on the track. Similar technology can be found in the Chinese invention patent application with publication number CN110902561A.

[0003] Due to the weight of the tower crane and heavy objects, there will be an unbalanced load between the multiple traveling wheels. If the unbalanced load is serious, it will affect the stable operation of the traveling mechanism and create a safety hazard. In addition, the direct impact of long-term load imbalance is that the multiple traveling wheels will have different degrees of wear. In actual maintenance, there is often a situation where only the severely worn traveling wheels are replaced, rather than replacing each traveling wheel at the same time. This increases the difference in the wear radius of the traveling wheels. When the wear difference between the various traveling wheels is too large, it may further affect the balance and transmission stability of the tower crane. If all traveling wheels are replaced for each maintenance, the cost of accessories will be very high. If the maintenance operation of replacing a single traveling wheel is frequently performed, the labor cost and other costs caused by production interruption cannot be ignored. Summary of the Invention

[0004] To solve the above problems, the present invention proposes a tower crane traveling mechanism, which improves the force distribution of the traveling wheels by monitoring the working status and wear of the traveling wheels, thereby reducing the wear difference of the traveling wheels while reducing the unbalanced load, improving the balance stability of the tower crane, reducing the maintenance frequency, and saving maintenance costs.

[0005] The technical solutions of the present invention are as follows:

[0006] A tower crane traveling mechanism, comprising:

[0007] A running wheel assembly, wherein the running wheel assembly has multiple groups and is arranged at the bottom of the base, cooperates with the track and runs on the track;

[0008] A driving assembly, wherein the driving assembly has multiple groups and is used to drive multiple groups of the traveling wheel assemblies to travel on the track, and the driving assembly includes a gear reducer;

[0009] A load balancing detection component, comprising a reducer operating parameter detection component and a travel wheel wear detection component;

[0010] The reducer operating parameter detection component detects the reducer operating parameters and determines the working state of each walking wheel according to the reducer operating parameters;

[0011] The walking wheel wear detection assembly is installed on each walking wheel and is used to detect the wear degree of each walking wheel;

[0012] A counterweight adjustment assembly, the counterweight adjustment assembly includes a counterweight member and a support adjustment member, the support adjustment member adjusts the position and / or distribution of the counterweight member according to the working state of the travel wheel detected by the reducer operating parameter detection assembly and the wear degree of the travel wheel detected by the travel wheel wear detection assembly.

[0013] The above-mentioned tower crane traveling mechanism has two groups of counterweights, which are respectively arranged on both sides of the tower body.

[0014] In the above-mentioned tower crane traveling mechanism, the reducer operating parameter detected by the reducer operating parameter detection component is current.

[0015] In the above-mentioned tower crane traveling mechanism, the traveling wheel wear detection component detects the wear size of the traveling wheel.

[0016] In the above-mentioned tower crane traveling mechanism, the support adjusting member adjusts the position of the counterweight members by adjusting the left-right and / or front-back positions of all the counterweight members on the base.

[0017] In the above-mentioned tower crane traveling mechanism, the support adjusting member adjusts the distribution of the counterweight members by adjusting the positions of the two groups of counterweight members relative to each other.

[0018] The above-mentioned tower crane traveling mechanism, the support adjustment member includes a first displacement frame and a second displacement frame, the first displacement frame is movably arranged on the base, and can move on the base according to a set displacement amount under the action of a driving force, and the second displacement frame is movably arranged on the first displacement frame, and can move on the first displacement frame according to a set displacement amount under the action of a driving force.

[0019] In the above-mentioned tower crane traveling mechanism, the first displacement frame is a hollow frame structure surrounding the tower body.

[0020] The above-mentioned tower crane traveling mechanism has two second displacement frames, each carrying two sets of counterweights.

[0021] The tower crane traveling mechanism is provided with a pressure sensor between the base and the traveling wheel assembly.

[0022] The present invention can achieve the following technical effects:

[0023] The tower crane traveling mechanism proposed in the present invention has a load balancing detection component provided for each traveling wheel to detect the working status and wear degree of each traveling wheel, so that the traveling wheel force can be adjusted in time according to the working status of each traveling wheel when obvious load imbalance occurs. Moreover, after a period of use, the pressure load distribution distributed on each traveling wheel can be improved through the counterweight adjustment component according to the wear difference of different traveling wheels, thereby reducing the wear difference of the traveling wheels and improving the balance stability of the tower crane. Moreover, for the maintenance of the traveling wheels, the maintenance frequency is reduced and the maintenance cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a tower crane traveling mechanism according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the composition principle of the load balancing detection component;

[0026] Figure 3 This is an enlarged view of the traveling part of the traveling mechanism of a tower crane provided in an embodiment of the present invention.

[0027] The components represented by the reference numerals in the figures are:

[0028] Travel wheel assembly-1, track-2, base-3, drive assembly-4, travel wheel wear detection assembly-5, counterweight-6, support adjustment member-7, first displacement frame-71, second displacement frame-72, pressure sensor-8. DETAILED DESCRIPTION

[0029] See also Figures 1 to 3 The tower crane travel mechanism provided in this embodiment is similar to similar travel mechanisms in the prior art and mainly includes a travel wheel assembly 1 and a drive assembly 4. The travel wheel assembly 1 has multiple sets, which are arranged at the bottom of the base 3 and cooperate with the track 2 to travel on the track 2. Correspondingly, there are multiple sets of drive assemblies 4 for driving multiple sets of the travel wheel assemblies 1 to travel on the track 2.

[0030] As shown in the figure, the drive assembly 4 generally includes a gear reducer.

[0031] In order to solve the problem raised by the present invention, this embodiment provides a load balancing detection component for each walking wheel. The load balancing detection component first includes a reducer operating parameter detection component. The reducer operating parameter detection component detects the reducer operating parameters and determines the working status of each walking wheel based on the reducer operating parameters.

[0032] The main parameter detected by the reducer operation parameter detection component here is the reducer current (which can be directly collected through the system controller, not shown in the figure). When the reducer drives the walking wheel to walk on the track, the walking wheel friction drives the track to realize the movement of the walking wheel. If a certain walking wheel has a gap with the track due to unbalanced load or long-term wear and tear, and there is no contact, the corresponding reducer torque load will become smaller, so the current of the drive motor of this reducer will also change accordingly. Therefore, by detecting each reducer current parameter, the working status of each walking wheel can be indirectly identified.

[0033] Based on the purpose of the present invention, another important parameter monitored by the present invention is the actual wear of the running wheel. Therefore, the load balancing detection component also includes a running wheel wear detection component 5. As shown in the figure, the running wheel wear detection component 5 is installed on each running wheel to detect the degree of wear of each running wheel. Here, the degree of wear is preferably evaluated by the wear size. The running wheel wear detection component 5 adopts a probe component for detecting the wear size, such as a probe component based on the principle of a resistor hybrid circuit.

[0034] To address the issues raised by the present invention, this embodiment further incorporates a counterweight adjustment assembly comprising a counterweight 6 and a support adjustment member 7. The counterweight 6 is already used in the prior art and primarily ensures the stability and balance of the tower crane. This embodiment primarily incorporates the support adjustment member 7, which is capable of adjusting the position and / or distribution of the counterweight 6 based on the operating status of the travel wheels detected by the reducer operating parameter detection assembly and the degree of travel wheel wear detected by the travel wheel wear detection assembly 5. Because the travel wheel operating status identified based on the reducer current change is affected by load variations and may result in a dynamic result, when the system sets a scheme for adjusting the counterweight based on current changes, the current change identification condition should be set to a change process with a certain duration or frequency, such as the current continuously falling below a set value within a set time period, or the frequency of falling below a set value within a set time period exceeding a limit. The travel wheel wear detection assembly 5 captures the actual wear of the travel wheels. Therefore, when wear reaches a certain level, the position and distribution of the counterweight can be adjusted directly based on the wear results of multiple travel wheels.

[0035] In a specific embodiment, as shown in the figure, there are two groups of counterweights 6, which are arranged on both sides of the tower body. The tower body can be a tower body composed of standard sections in the prior art, which is no longer shown in the figure.

[0036] More specifically, in the tower crane traveling mechanism of this embodiment, the support adjustment member 7 can adjust the position of the counterweight 6 by adjusting the left and right and / or front and back positions of all the counterweights 6 on the base 3, and can adjust the distribution of the counterweight 6 by adjusting the positions of the two groups of counterweights 6 relative to each other. As long as the above-mentioned adjustment purpose can be achieved, the adjustment method is not limited. For example, as shown in the figure, the support adjustment member 7 can include a first displacement frame 71 and a second displacement frame 72. The first displacement frame 71 is movably arranged on the base 3 and can move on the base 3 according to a set displacement amount under the action of a driving force. The second displacement frame 72 is movably arranged on the first displacement frame 71 and can move on the first displacement frame 71 according to a set displacement amount under the action of a driving force. The driving force here can be provided by a motor or a hydraulic power head with different movement directions (not shown in the figure).

[0037] In order to reasonably avoid the standard section of the tower body during movement, the first displacement frame 71 mentioned above should be a hollow frame structure surrounding the tower body. Similarly, as shown in the figure, there are also two second displacement frames 72, which are arranged on both sides of the tower body, respectively carrying two sets of counterweights 6.

[0038] In the above scheme, in order to improve the pressure load distribution distributed on each walking wheel through the counterweight adjustment assembly according to the detected working status of the walking wheel and the wear difference of different walking wheels, as shown in the figure, a pressure sensor 8 is arranged between the base 3 and the walking wheel assembly 1, and each walking wheel assembly 1 has its own corresponding pressure sensor 8 to detect the force. The pressure sensor 8 collects the force size or force floating condition of each walking wheel assembly 1 and provides data to the control system, so that the control system can adjust the position and distribution of the counterweight 6 through the support adjustment member 7 according to the detection result to improve the pressure load distributed on each walking wheel. This adjustment process can also be carried out in conjunction with the tower crane balance arm and / or auxiliary beam, thereby reducing the wear difference of the walking wheel and improving the balance stability of the tower crane. Moreover, for the maintenance of the walking wheel, the maintenance frequency is reduced and the maintenance cost is saved.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A tower crane traveling mechanism, characterized in that: include: A running wheel assembly (1), wherein the running wheel assembly (1) comprises a plurality of groups and is arranged at the bottom of a base (3), cooperates with a track (2) and runs on the track (2); a driving assembly (4), wherein the driving assembly (4) comprises a plurality of groups and is used to drive the plurality of running wheel assemblies (1) to run on the track (2), and the driving assembly (4) comprises a gear reducer; A load balancing detection component, the load balancing detection component includes a reducer operating parameter detection component and a walking wheel wear detection component (5); the reducer operating parameter detection component detects the reducer operating parameters and determines the working state of each walking wheel according to the reducer operating parameters; the walking wheel wear detection component (5) is installed on each walking wheel and is used to detect the degree of wear of each walking wheel; a counterweight adjustment component, the counterweight adjustment component includes a counterweight member (6) and a support adjustment member (7), the support adjustment member (7) adjusts the position and / or distribution of the counterweight member (6) according to the working state of the walking wheel detected by the reducer operating parameter detection component and the degree of wear of the walking wheel detected by the walking wheel wear detection component (5); There are two groups of counterweights (6), which are respectively arranged on both sides of the tower body; The reducer operating parameter detected by the reducer operating parameter detection component is current; The support adjustment member (7) comprises a first displacement frame (71) and a second displacement frame (72); the first displacement frame (71) is movably arranged on the base (3) and can move on the base (3) according to a set displacement amount under the action of a driving force; the second displacement frame (72) is movably arranged on the first displacement frame (71) and can move on the first displacement frame (71) according to a set displacement amount under the action of a driving force.

2. A tower crane traveling mechanism according to claim 1, characterized in that: The walking wheel wear detection component (5) detects the wear size of the walking wheel.

3. The tower crane traveling mechanism according to claim 1, characterized in that: The support adjustment member (7) adjusts the position of the counterweight member (6) by adjusting the left-right and / or front-back positions of all the counterweight members (6) on the base (3).

4. A tower crane traveling mechanism according to claim 1 or 3, characterized in that: The support adjustment member (7) adjusts the distribution of the counterweight members (6) by adjusting the positions of the two groups of counterweight members (6) relative to each other.

5. The tower crane traveling mechanism according to claim 1, characterized in that: The first displacement frame (71) is a hollow frame structure surrounding the tower body.

6. The tower crane traveling mechanism according to claim 1, characterized in that: There are two second displacement frames (72), each carrying two sets of counterweights (6).

7. The tower crane traveling mechanism according to claim 1, characterized in that: A pressure sensor (8) is provided between the base (3) and the walking wheel assembly (1).

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